Amy Louise Acker is an American actress from Dallas, Texas.
Acker made her major television debut when she starred as Winifred "Fred" Burkle on the 2nd - 5th seasons of Angel, and also as the character of Illyria for part of the show's 5th and final season. She won the 2003 Saturn Award for Best Supporting Actress on Television for her portrayal.
She joined the cast of Alias in 2005 for its final season, playing villainess Kelly Peyton. Acker graduated from guest star to fully credited cast member as the show entered the final episodes in April and May 2006. Also in 2005, Acker provided voice acting for the character of Huntress on the animated series Justice League Unlimited. She went on to make a guest appearance on How I Met Your Mother, in which she was reunited with Angel co-star, Alexis Denisof (the real-life husband of HIMYM star Alyson Hannigan), who had a recurring role on the show.
In 2010, she was a series regular in the ABC drama Happy Town, portraying the character Rachel Conroy. That same year, she starred in the season-one finale of the Fox series Human Target, as the mysterious Katherine Walters. On May 25, 2010, she appeared on CBS's The Good Wife. She appeared in the horror movie The Cabin in the Woods, released April 13, 2012. In 2012, she made guest performances in Warehouse 13, Once Upon A Time, and Grimm. In 2012, she starred as Beatrice in Joss Whedon's Much Ado About Nothing.
Acker appeared in the sitcom Husbands 's third season as Claudia, the ex-fiancée of Brady Kelly who unexpectedly shows up. In March 2014, Acker was cast as Audrey, a former lover to Phil Coulson in an episode of Agents of S.H.I.E.L.D.. Amy can currently be seen playing "Root" on the CBS TV series PERSON OF INTEREST.